Answers

2014-06-03T18:39:01+05:30
half filled and completely filled orbitals are more stable than partially filled.Copper and chromium should be partially filled according to Hund's rule. but as it is not stable it attains special configuration and becomes half filled.


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2014-06-03T21:20:25+05:30
1S2 2S2 2P6 3S2 3P6 4S13D5
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